Fouad Siniora

AMMAN, Jordan — Mourners in Beirut paid emotional tribute Sunday to a well-known Lebanese politician who was killed Friday in a car bomb, an attack that heightened tensions stemming from Syria’s bitter civil war. Security was tight for the funeral of Mohamad Chatah, a former ambassador to the United States and an adviser to successive Lebanese leaders, who died along with six others in the massive bombing in the heart of Beirut’s commercial district. More than 70 people were hurt. Chatah, 62, was a critic of Syrian President Bashar Assad and the Lebanese Shiite militia Hezbollah, which is allied with the Syrian regime. No one has claimed responsibility for the...